Abstract: A wiring board for a fingerprint sensor includes a core insulating layer having a thickness of 30 ?m to 100 ?m, an inner buildup insulating layer having a thickness of 17 ?m to 35 ?m, an outer buildup insulating layer having a thickness of 7 ?m to 25 ?m, a plurality of fingerprint reading outer strip-shaped electrodes, a plurality of fingerprint reading inner strip-shaped electrodes, and an upper solder resist layer covering the outer strip-shaped electrodes by a thickness of 3 ?m to 15 ?m.

Abstract: A wiring board for a fingerprint sensor includes a core insulating layer having a thickness of 30 ?m to 100 ?m, an inner buildup insulating layer having a thickness of 17 ?m to 35 ?m, an outer buildup insulating layer having a thickness of 7 ?m to 25 ?m, a plurality of fingerprint reading outer strip-shaped electrodes, a plurality of fingerprint reading inner strip-shaped electrodes, and an upper solder resist layer covering the outer strip-shaped electrodes by a thickness of 3 ?m to 15 ?m.

Abstract: A method for producing a wiring board includes the steps of forming an upper insulating layer on a lower insulating layer having a lower wiring conductor on its upper surface; forming a via-hole in the upper insulating layer; depositing a first base metal layer in the via-hole and on an upper surface of the upper insulating layer; forming a first plating resist layer on the first base metal layer; depositing a first electrolytically plated layer to completely fill at least the via-hole; forming a via conductor, and depositing a second base metal layer; forming a second plating resist layer on the second base metal layer; depositing a second electrolytically plated layer; and forming a wiring pattern.

Abstract: A manufacturing method includes a step of forming a first plating mask on a base metal layer, a step of forming a main conductor layer on the base metal layer exposed from the first plating mask, a step of forming a second plating mask on them, a step of attaching a metal plating layer to an upper surface of the main conductor layer exposed from the second plating mask, a step of removing the first and second plating masks, a step of etching away a portion of the base metal layer to which the main conductor layer is not attached, and a step of forming a solder resist layer.

Abstract: A wiring board in which a semiconductor element connection pad formed on a strip-shaped wiring conductor and an electrode of a semiconductor element are firmly connected together, the wiring board having excellent electrical insulation between the semiconductor element connection pads which are adjacent to each other.

Abstract: A method of manufacturing a printed circuit board includes forming a through hole 2 in an insulating layer 1 having upper and lower faces so as to penetrate between the upper and lower surfaces; allowing a first plated conductor 4 to be deposited at least in the through hole 2 and on the upper and lower surfaces around the through hole; removing the first plated conductor overlying and underlying a periphery of the through hole by etching the first plated conductor 4, while leaving at least the first plated conductor 4 in a mid-portion in a vertical direction within the through hole 2; and forming by semi-additive method a second plated conductor 6 that fills an outer portion than the first plated conductor 4 in the through hole 2, and forms a wiring conductor on the upper and lower surfaces.

Abstract: A wiring board includes a plurality of circular semiconductor element connection pads deposited in a lattice form onto a mounting portion of an insulation substrate, their upper surfaces being connected to electrodes of a semiconductor element. A solder resist layer is deposited onto the insulation substrate, which covers the side surfaces of these pads and exposes the upper surfaces of these pads. The solder resist layer has a concave part whose bottom surface corresponds to at least all the upper surfaces of these pads.

Abstract: In a wiring board, insulation layers and wiring conductors are alternately laminated, and a plurality of strip-shaped wiring conductors for connecting semiconductor elements are arranged side by side on the outermost insulation layer. Each of the wiring conductors partly has a connection pad to which the electrode terminals of the semiconductor elements are connected by flip-chip bonding. In the wiring board, a solder resist layer is deposited over the outermost insulation layer and the strip-shaped wiring conductors so as to have slit-shaped openings for exposing the upper surfaces of the connection pads. The solder resist layer fills up the space between the connection pads adjacent to each other and exposed within the slit-shaped openings.

Abstract: A method of manufacturing a printed circuit board includes forming a through hole 2 in an insulating layer 1 having upper and lower faces so as to penetrate between the upper and lower surfaces; allowing a first plated conductor 4 to be deposited at least in the through hole 2 and on the upper and lower surfaces around the through hole; removing the first plated conductor overlying and underlying a periphery of the through hole by etching the first plated conductor 4, while leaving at least the first plated conductor 4 in a mid-portion in a vertical direction within the through hole 2; and forming by semi-additive method a second plated conductor 6 that fills an outer portion than the first plated conductor 4 in the through hole 2, and forms a wiring conductor on the upper and lower surfaces.

Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.

Abstract: The present invention provides a method of manufacturing a printed circuit board. The method includes the steps of preparing an insulating substrate having a front surface and a back surface and a layer of metal foil formed on each of the front surface and the back surface; selectively forming a plating layer for forming a land on at least one of the metal foils; adjusting a thickness of the plating layer; and forming the metal foils into lines.

Abstract: A wiring board is comprised of a plurality of circular semiconductor element connection pads deposited in a lattice form onto a mounting portion of an insulation substrate, their upper surfaces being connected to electrodes of a semiconductor element, and a solder resist layer deposited onto the insulation substrate, which covers the side surfaces of these pads and exposes the upper surfaces of these pads. The solder resist layer has a concave part whose bottom surface corresponds to at least all the upper surfaces of these pads.

Abstract: A printed wiring board having a through hole conductor formed on the surface of a through hole formed in a copper-clad laminate board, and on the surface of the copper-clad laminate board 1 in the vicinity of an opening of the through hole. The through hole conductor is filled with a positive photosensitive resin. A capped conductor is formed on the positive photosensitive resin and is coupled to the through hole conductor. Further, a circuit pattern is formed on the surface of the copper-clad laminate board. An insulating layer is formed on the surface of the copper-clad laminate board, capped conductor, and the circuit pattern, and formed with a via hole extending from the surface of the insulating layer to the capped conductor. A via conductor is formed inside the via hole and on the surface of the insulating layer in the vicinity of an opening of the via hole.

Abstract: In a wiring board, insulation layers and wiring conductors are alternately laminated, and a plurality of strip-shaped wiring conductors for connecting semiconductor elements are arranged side by side on the outermost insulation layer. Each of the wiring conductors partly has a connection pad to which the electrode terminals of the semiconductor elements are connected by flip-chip bonding. In the wiring board, a solder resist layer is deposited over the outermost insulation layer and the strip-shaped wiring conductors so as to have slit-shaped openings for exposing the upper surfaces of the connection pads. The solder resist layer fills up the space between the connection pads adjacent to each other and exposed within the slit-shaped openings.

Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.

Abstract: A printed wiring board having a through hole conductor formed on the surface of a through hole formed in a copper-clad laminate board, and on the surface of the copper-clad laminate board 1 in the vicinity of an opening of the through hole. The through hole conductor is filled with a positive photosensitive resin. A capped conductor is formed on the positive photosensitive resin and is coupled to the through hole conductor. Further, a circuit pattern is formed on the surface of the copper-clad laminate board. An insulating layer is formed on the surface of the copper-clad laminate board, capped conductor, and the circuit pattern, and formed with a via hole extending from the surface of the insulating layer to the capped conductor. A via conductor is formed inside the via hole and on the surface of the insulating layer in the vicinity of an opening of the via hole.

Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.